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densk [106]
3 years ago
9

We identify types of rocks by how the rocks form. If you're not sure what type of rock you're holding, look for clues. Because i

gneous rocks form when magma and lava cool, they often have crystals. Crystals are clear, hard solids. The longer the rock takes to cool, the bigger the crystals will be. Basalt has large crystals because it cools slowly. Other igneous rocks cool so quickly that gas from the magma doesn't have time to escape into the air before the magma turns solid. This leaves some igneous rocks, like scoria, with holes or spaces in them. Igneous rocks rarely contain fossils and are not layered. What do holes in igneous rocks indicate about the cooling process of the magma? A The magma cooled too quickly for gas to escape. B The molten rock cooled slowly. C The magma cooled in layers. D The rock cooled with fossils in each of the holes or spaces.
Biology
1 answer:
vladimir1956 [14]3 years ago
7 0

Answer:

A. The magma cooled too quickly too quickly for gas to escape.

Explanation:

Scoria is a type of extrusive igneous rock. Some of their characteristics include that they cool quickly with no time for large crystals to form, some of them have large vesicles which are holes caused by gas bubbles when the lava was molten.

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What is the effect of the fermentation byproducts on the growing bacteria?
andriy [413]

Answer:

The byproducts cause the released of high concentration in the fermentation acids and the deceases in the level pf PH. It basically leads to inhibition of the growth of many bacteria. The toxicity at low PH value of the fermentation acids traditionally defined the uncoupling mechanisms. The fermentation acid are resistant bacteria with low PH and It able to generated the ATP and groe the low PH intracellular.

3 0
3 years ago
The population of a colony of mosquitoes obeys the law of uninhibited growth. If there are 1000 mosquitoes initially and there a
Agata [3.3K]

Answer:

2,855 is the size of the colony of mosquitoes after 4 ​days.

Explanation:

The law of uninhibited growth is given as:

A=A_o\times e^{k\times t}

A_o= Original amount

A = Amount after time t

k = Positive constant repressing the rate of growth

We are given with:

Original population of mosquitoes = 1000

Population of mosquitoes after 1 day =1300

t = 1 day

1300=1000\times e^{k\times 1 day}

k = 0.2623 day^{-1}

Population size of mosquitoes after 4 days

A_o=1000, k= 0.2623 day^{-1}

A =? , t = 4 days

A=1000\times e^{ 0.2623 day^{-1}\times 4 days}

A =2,855.36 ≈ 2,855 mosquitoes

2,855 is the size of the colony of mosquitoes after 4 ​days.

5 0
3 years ago
Read 2 more answers
In the Kirby-Bauer disk diffusion test, the _______ of the zone of inhibition is measured and used for interpretation.
snow_tiger [21]

Answer:

The correct option is : a. diameter    

Explanation:

The Kirby–Bauer test or the disk diffusion test, is a method to determine the antibiotic sensitivity of the given bacteria. This test involves the use of antibiotic discs to determine the effect of antibiotics on the bacteria.

In this test, the wafers having antibiotics and the bacteria are placed on the agar plate and incubated. If the antibiotics present stops the growth of the bacteria, there will be an area around wafer with no bacterial growth, such an area is known as the zone of inhibition.

<u>The </u><u>diameter of this zone of inhibition</u><u> is measured to determine the </u><u>antibiotic sensitivity of the given bacteria</u><u>.</u>

7 0
3 years ago
If the atp synthase for an organism contains 15 c subunits, how many protons must flow through atp synthase per each new atp tha
anastassius [24]

Each time a new ATP is created, ATP synthase must process 5 protons.

<h3>Where is ATP synthase found and what does it do?</h3>
  • ADP and phosphate are converted into ATP by the mitochondrial enzyme ATP synthase, which is located in the inner membrane.
  • Protons are transported over a gradient created by electron transfer from the chemically positive to the negative side of the proton, which drives the flux of protons.
<h3>How does photosynthesis's ATP synthase function?</h3>
  • The light-driven production of ATP is catalyzed by the chloroplast ATP synthase, which is activated in the light and deactivated in the dark by redox-modulation via the thioredoxin system.
  • This down-regulation is thought to be crucial for minimizing wasted ATP hydrolysis at night.
<h3>What makes ATP synthase so crucial?</h3>

All cellular functions are powered by ATP, which is constantly used by cells and required for production. About 100 ATP molecules can be produced by each ATP synthase every second.

learn more about ATP synthase here

<u>brainly.com/question/893601</u>

#SPJ4

3 0
1 year ago
How do the diffuse modulatory and point-to-point synaptic communication systems in the brain differ? list four ways?
Vesna [10]

Diffuse modulatory synapses or neuromodulation function different than simple point-to point synapses.

1. Number of postsynaptic neurons

In neuromodulation neuron uses one or more neurotransmitter to regulate several neurons. In Synaptic point-to-point transmission only one particular neuron receives signal from the presynaptic neuron.

2. Neurotransmitter sin neuromodulation (neuromodulators) are not reabsorbed broken down by the pre-synaptic neuron like those in classic synapse. Neuromodulators stay in cerebrospinal fluid.

3. Receptors are also different: the receptors for the neuromodulators are typically G-protein coupled receptors while in classical chemical neurotransmission, they are ligand-gated ion channels.

4. Neuromodulation is a slow process, while classic synaptic transmission occurs fast.


5 0
3 years ago
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